Process of manufacturing wick-holders.



L. T. WILCOX. PROCESS OF MANUFACTURING WICK HOLDERS.

I APPLICATION. FILIED MAY25, 1915.

1,167,960, Patented Jan. 11, 1916.

To all who-m' Concern:

, citizenof the Unit'e'dStat'es, and a resident from topto bottom,

of Pe ekslz'illpinl the county of lYestchester, State of New fork', have invented certain new and useful Improvements in Processes of Manufacturing WVick-l lolders. &c., of which the following is a specification.

The improvements relate to the' manufacturepfperforated' cylinders adapted to contain and carry the wicks of liquid hydrocarhon burnersiibnt maybe used. in the manufacture of other similar articles.

The wick carriers ordinarily used in oil burners consi stof a cylinder of sheet metal within which the wick is secured, This cylinder is provide ctwith perforations adapted to be engaged by the spur of the wick raisingdevice,.whereby the wick is raised and lowered, It is common I tions. of. theniwick carrier extend entirely around its circumference and substantially althougrliit is not neces-' sary to'zhave the perforations extend beyond the zone of engagementbetweenthe carrier and thewick aiser, as the oil has free access Q ;t l1 wick on th e inside. thereof. These carriers; are usually, manufactured in the fol- 1 '2 placedi P-l desired extent.

lowing niannen' circular diskof metal is punched out of- ,sheet of the material, and then drawn ,or-sp'i-ininto the form of a cylinlder-p itl1gone-end'closedQ.This cup is then orating: machine, and held there oi-di-iia rily ,by having holes punched through the' bottom and engaged by suitable projections on thespindle, then rotated and subjected to the action of. a reciprocating puncbuntilnits sides are perforated to the T he central portion of the bottom is then punched out. and the portion near the edge of thecylinder turned up to engage the bottom of the wick, which is then placed therein. This process has various objections. A considerable percentage of the blanks are spoiled in the makingzfland time and materials thus wasted. Furthermore in punching or cutting a round disk from a rectangular sheet of material a considerable part of the material is lost, and of the material of the circular blank with which the operation begins a certain part is wasted when the closed end of the cylinder is punched out. Actual experience has demonstrated that at least thirty per cent. of the material employed in the process described does not enter into the finished article, and is therefore PROCESS or iviArtUFAc'rumNG WmK-itoLnsRs; 5. X1

Specification of Letters Patent,

to have the perforaof one ofthe wheels of Avidth equal to punched into the and 2.

Patented Jan;

' Ap1i1ication fi1edM ay25, 19 15. seriaiitofsoesi.

lost. "\Vith theiiiethod herein described sub sta itiallv one hundred per ce nt. of the mateial-' \\'ithout deducting for the" perforatioiis-is, utilized, and a considerable aii iount incident'to'extra operations. In addition to this a stronger and moresatisfactorycarrier' is savedalso in labor,toolsand the overhead 'squa re inches of sheet metal are required for each wick carrier three and one-half inches in'd1am ct'e'r and two and one-half inches high, whereas by the method herein described less than thirty square inches of'materi'al will produce the same article.

In the drawings, Figure'lisa planof a rectangular blank ofsheet metal after being subjected to the first operation ra process embodying the iniprovementsi i I Fig. 3 is a plan ofthe material after it has been subjected to the second operation and formed into a cylinder, the parts adjacent to the secured edges longitudinal edge yiew thereof with the ends n vertical section,

of the metal being shown in horizontal s'ec- 'llOll. is a vertical medial section.,of the'cylinder of Fig. 3

looking from bottom to top of that figure. l ig. 5 is a vi'eiw siihilarto .F 4. and of the same parts. after the final operation. Figt tiflis aflvie flin elevation employed in turning the edge of the cylinder.

A rectangular blank of sheet metal of length equal to the diameter of tliepi'oposed cylinder multiplied desired overlap for the seam or (joint. and the height of thesaid cylinder plus the turned up lower is first produced. This blank is then placed in a suitablc die press form shown in Figs 1 In this operation'the perforations A, B and C are formed and also the curved overlapping seam members E and D, also the annular flange A surrounding the perforations A. One or more of these operationsas for instance the formation of the perforations A and their surrounding flange may be performed separately. It will be noted that the seam members D and E at the ends are curved in the primary operation and that the latter is offset. This curvature is on the radius of the cylinder subsequently formed, so that an even exterior surface will be presented at the seam, and

by 3.1416 and'plus the i and stamped 'and' I means.

the offset receives the edge of the other member. The perforations C extend a part of the length of the blank only, but they ,may extend the entire l ngth of the blank or throughout any desired section or part thereof.

In the next operation the strip of material is doubled, preferably over a suitable form and the ends brought together so that the parts D,and 1-) overlap and the flanges A enter the holes B. The inner edges of the flanges A are then upset by a hammer striking the exterior of the cylinder at this point and compressing the flange between it and the anvil inside, or by other suitable In this manner a seam is formed and the overlapping parts secured together, without the employment of rivets or other fastening means. the upset or clenched edges A binding the parts securely and reinforcing the edges of the openings.

In the next operation the lower edge F of the cylinder formed in the preceding operations is turned up. as shown in Fig. 5, by means of grooved wheels such as the wheels (I? illustrated in Fig. 6, or by other suitable means. This completes the structure. Before this lastv operation, however, the cylindrical wick is placed inside the cylinder so that when the lower edge F is turned up it will bind the bottom edge of the wick and hold it securely in place. It will be understood that when the wick is thus secured within the carrier it is allowed to extend a suilicient distance above the carrier to span the space between the wick v raising device and the combustion zone of the burner.

The advantages of the process herein described will be apparent to those skilled in the art. One of these advantages resides in the fact that by forming the perforations and annular flanges and uniting them in the manner described the diameter of the cylindrical 'arrier is fixedwith a degree of accuracy and precision not obtainable by the use of ordinary rivets or by folding the edges of the sheet of metal or hv other methods. Another advantage resides in the fact that the finished article presents a smooth exterior so that it will fit exactly in the wick tube and not cause any flanges through the openings of the opposite end and upsetting said flanges snugly over said other, end.

The method of making cylindrical carriers and the like. which consists in forming a zone of perforations in and transversely of a substantially flat blank. forming-openings in both ends of said blank. and producing upstanding integral rivet flanges around the openings at one end from the metal displaced in forming said openings. bending the blank to tubular form. passing the said flanges through the openings of the opposite end. and upsetting said flanges snugly over said other end.

The method of making cylindrical carriers and the like, which consists in forming a zone of perforations in and transversely of a substantially flat blank, producing flanges at the ends of said blank in a longitudinal curvature that is substantially the curvature of the completed carrier, forming openings in said flanges, the openings at one end being of greater diameter than those of the other and the metal displaced in forming said other openings constituting circular upstanding rivet flanges that snugly pass through the larger openings at the opposite end. bending the blank to tabular form, passing the said flanges through the openings of said opposite end, and upsetting said flanges over said opposite end.

Vitness my hand this llth day of May, 1915. at the city of Yew York. in the county and State of New York.

LEVIS T. \VILCOX.

Witnesses:

Many H. Liawi's. S. J. Cox. 

